Source code in the bash programming language

#! /bin/bash
# very simple way to detect a palindrome in Bash
# output of bash --version -> GNU bash, version 4.4.7(1)-release x86_64 ...

echo "enter a string"
read input

size=${#input}
count=0

while (($count < $size))
do
    array[$count]=${input:$count:1}
    (( count+=1 ))
done

count=0

for ((i=0 ; i < $size; i+=1))
do
    if [ "${array[$i]}" == "${array[$size - $i - 1]}" ]
    then
        (( count += 1 ))
    fi
done

if (( $count == $size ))
then
    echo "$input is a palindrome"
fi